Society of the Holy and Undivided Trinity

It was notable for having been founded by Marian Hughes, the first woman to take religious vows in the Church of England since the Reformation.

[1] She became the first woman to take religious vows in the Anglican church since the Reformation when she privately made them in 1841 to Edward Bouverie Pusey at the home of Ann and Charles Seager.

In 1866, work started on a purpose-built convent on land on Woodstock Road bought from St John's College.

After initially proposing a circular design based on the symbolism of the Holy Trinity, Buckeridge took a more traditional approach and drew up the plans sometime before 1865.

It is said that upon first seeing the convent's new premises, the architect William Butterfield commented that it was the 'best modern building in Oxford after my college', by which he meant Keble.

As a 'Middle Class Day School' it was to provide a 'good and sound English Education' with a 'high-principled moral tone' to the daughters of college servants and small tradesmen, for 195 girls in Winchester Road.

One committee managed both St Denys's girls' and SS Philip and James boys and infants schools.

[9] The sisters also ran St Michael's School, for girls from a professional background, originally in the north wing of the convent, and then, from the 1920s, in Cirencester.

The building's chapel, which was built during the years 1891–1894 to Buckeridge's original design, now houses the college library.